Pith Number

pith:TF75FDHQ

pith:2009:TF75FDHQYU7V5DOTYCDWIPGSWE

not attested not anchored not stored refs pending

Physics, Topology, Logic and Computation: A Rosetta Stone

John C. Baez, Mike Stay

arxiv:0903.0340 v3 · 2009-03-02 · quant-ph · math.CT

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TF75FDHQYU7V5DOTYCDWIPGSWE}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-05T02:02:29.672835Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

997fd28cf0c53f5e8dd3c087643cd2b11f95c463a6d2308d981c532025fd39ba

Aliases

arxiv: 0903.0340 · arxiv_version: 0903.0340v3 · doi: 10.48550/arxiv.0903.0340 · pith_short_12: TF75FDHQYU7V · pith_short_16: TF75FDHQYU7V5DOT · pith_short_8: TF75FDHQ

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/TF75FDHQYU7V5DOTYCDWIPGSWE \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 997fd28cf0c53f5e8dd3c087643cd2b11f95c463a6d2308d981c532025fd39ba

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b2c279e78f722beb412140c054914730d8dddfc4c5811f81f5b92a1d7270889f",
    "cross_cats_sorted": [
      "math.CT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2009-03-02T20:38:42Z",
    "title_canon_sha256": "6bb2d77d3848f89abdc0cba7c1d4cbaaaf7a0d22f3eb931c48a4e04a75e87a19"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.0340",
    "kind": "arxiv",
    "version": 3
  }
}